I'm very much aware of me having too much infamy, Castille ate portogal and aragon in about 10 years, got a union with and later inherited naples who had been blitzing italy and together they conquered southern france. I, along with burgundy, my vassal france(or what's left of it, between me claiming my cores and castille owning the southern half) and emperor bohemia waged en epic 10 year war on them, conquering most of their territory slowly as I lured their giant armies into attrition deathtraps, landing a single regiment in the Pyrenees in november and have their entire 60000 men strong army watlz in during severe winter, then disembarking more tiny units every so often to tie them up during the winter months. Then they offered me a peace deal which seemed too good to be true, which basically amounted to their entire territory except for their centres of trade. I accepted, quintupled my nation's size and received about 300 infamy for my troubles. Then, one by one, every single european ruler apparently had a deathwish, and declared war on me with their piddly little city-states and the only way to make them stop was to conquer them too. I'm now at 330 provinces and 700 infamy, my only colonies being greenland and the islands on my side of the atlantic coast and the rest of europe(consisting of austria owning greece, the balkans, hungary, themselves and most of former bohemia) and about 20 imperial states with half that many balkanites encapsulated by austria all throwing every single spy they have at me, funding nationalists in ireland, scotland and my holdings in france.
Also, I picked the idea that should decrease stability cost by 33% but it only went from 104400.000 to 104360.000, which I'm pretty sure is actually 0.04% and not 33%. Also, my war exhaustion supposedly gave me 37% extra so I used my rare moments of peace to get rid of that but that actually made the price go up to 104446.000 instead, which also makes zero sense to me. And building temples(about 50 of them) did absolutely nothing. Yes I have waited for the month to end and let the prices update in all cases.
And revolt risk isn't directly affected by infamy, only shoots up to 15% everywhere because of foreign spies.